On Fri, Nov 13, 2020 at 03:02:19PM +0100, Thomas Gleixner wrote: > RT requires the softirq to be preemptible and uses a per CPU local lock to > protect BH disabled sections and softirq processing. Therefore RT cannot > use the preempt counter to keep track of BH disabled/serving. > > Add a RT only counter to task struct and adjust the relevant macros in > preempt.h. You may want to describe a bit the reason for this per task counter. It's not intuitive at this stage. Thanks.
